[INFO] fetching crate arcon_codegen 0.1.4...
[INFO] testing arcon_codegen-0.1.4 against 1.60.0 for beta-1.61-1
[INFO] extracting crate arcon_codegen 0.1.4 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate arcon_codegen 0.1.4 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arcon_codegen 0.1.4
[INFO] finished tweaking crates.io crate arcon_codegen 0.1.4
[INFO] tweaked toml for crates.io crate arcon_codegen 0.1.4 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v677.0.0
[INFO] [stderr]   Downloaded rustc-rayon-core v0.3.2
[INFO] [stderr]   Downloaded rustc-rayon v0.3.2
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v677.0.0
[INFO] [stderr]   Downloaded arcon_spec v0.1.3
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_passes v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_expand v677.0.0
[INFO] [stderr]   Downloaded termize v0.1.1
[INFO] [stderr]   Downloaded annotate-snippets v0.8.0
[INFO] [stderr]   Downloaded arcon_messages v0.1.2
[INFO] [stderr]   Downloaded arcon_backend v0.1.1
[INFO] [stderr]   Downloaded arcon_error v0.1.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v677.0.0
[INFO] [stderr]   Downloaded rustfmt-nightly v1.4.21
[INFO] [stderr]   Downloaded arcon_extra v0.1.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v677.0.0
[INFO] [stderr]   Downloaded psm v0.1.18
[INFO] [stderr]   Downloaded stacker v0.1.14
[INFO] [stderr]   Downloaded rustc-ap-rustc_attr v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v677.0.0
[INFO] [stderr]   Downloaded measureme v0.7.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v677.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v677.0.0
[INFO] [stderr]   Downloaded rustfmt-config_proc_macro v0.2.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v677.0.0
[INFO] [stderr]   Downloaded keyby v0.2.0
[INFO] [stderr]   Downloaded executors v0.4.4
[INFO] [stderr]   Downloaded arcon_macros v0.1.3
[INFO] [stderr]   Downloaded kompact-actor-derive v0.7.0
[INFO] [stderr]   Downloaded kompact-component-derive v0.7.0
[INFO] [stderr]   Downloaded kompact v0.7.0
[INFO] [stderr]   Downloaded llvm-sys v60.6.0
[INFO] [stderr]   Downloaded arcon v0.1.3
[INFO] [stderr]   Downloaded synchronoise v0.4.0
[INFO] [stderr]   Downloaded weld v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a2226b88b0a841dbe1612cd8eed5c261333e6885c037d8b23a1715e5b57e893
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2a2226b88b0a841dbe1612cd8eed5c261333e6885c037d8b23a1715e5b57e893", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a2226b88b0a841dbe1612cd8eed5c261333e6885c037d8b23a1715e5b57e893", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a2226b88b0a841dbe1612cd8eed5c261333e6885c037d8b23a1715e5b57e893", kill_on_drop: false }`
[INFO] [stdout] 2a2226b88b0a841dbe1612cd8eed5c261333e6885c037d8b23a1715e5b57e893
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 399609962a20265d31be7085a6803e47af282ad6141818a77722a3a032271c40
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "399609962a20265d31be7085a6803e47af282ad6141818a77722a3a032271c40", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.2
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling fastrand v1.7.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling rustc-ap-rustc_graphviz v677.0.0
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.8.0/src/lib.rs:83:37
[INFO] [stdout]    |
[INFO] [stdout] 83 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[INFO] [stderr]    Compiling annotate-snippets v0.8.0
[INFO] [stderr]    Compiling rustc-ap-rustc_fs_util v677.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_graphviz-677.0.0/src/lib.rs:278:1
[INFO] [stdout]     |
[INFO] [stdout] 278 | #![feature(nll)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "399609962a20265d31be7085a6803e47af282ad6141818a77722a3a032271c40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "399609962a20265d31be7085a6803e47af282ad6141818a77722a3a032271c40", kill_on_drop: false }`
[INFO] [stdout] 399609962a20265d31be7085a6803e47af282ad6141818a77722a3a032271c40